fix: add temp_cleanup.py to npm package files whitelist

PR #158 added temp_cleanup.py and its import in autonomous_agent_demo.py
but did not include the file in the package.json "files" array. This
caused ModuleNotFoundError for npm installations since the module was
missing from the published tarball.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

package.json

@@ -34,6 +34,7 @@
     "registry.py",
     "rate_limit_utils.py",
     "security.py",
+    "temp_cleanup.py",
     "requirements-prod.txt",
     "pyproject.toml",
     ".env.example",